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FAQs on Past Year Paper, Physics (Set - 3), 2016, Class 11, Physics - Additional Study Material for NEET

1. What are the units of measurement commonly used in physics?
Ans. In physics, there are several commonly used units of measurement. Some of these include: - Length: Meter (m) - Mass: Kilogram (kg) - Time: Second (s) - Electric Current: Ampere (A) - Temperature: Kelvin (K) - Amount of Substance: Mole (mol)
2. What is the difference between scalar and vector quantities in physics?
Ans. Scalar quantities in physics are those that have only magnitude, such as distance or speed. On the other hand, vector quantities have both magnitude and direction, such as displacement or velocity. Scalar quantities can be added or subtracted algebraically, while vector quantities require taking into account their direction and follow vector addition and subtraction rules.
3. What is the law of conservation of energy in physics?
Ans. The law of conservation of energy states that energy cannot be created or destroyed, but it can only be transferred or transformed from one form to another. This means that the total energy of a closed system remains constant over time. Energy can change its form, such as from potential energy to kinetic energy, but the total amount of energy in the system remains constant.
4. What is the difference between speed and velocity in physics?
Ans. Speed is a scalar quantity that represents how fast an object is moving. It is defined as the distance traveled per unit of time, without considering the direction. On the other hand, velocity is a vector quantity that includes both speed and direction. It is defined as the rate of change of displacement per unit of time. Velocity takes into account the direction of motion in addition to the magnitude of speed.
5. What is the relationship between force, mass, and acceleration in physics?
Ans. According to Newton's second law of motion, the relationship between force (F), mass (m), and acceleration (a) can be expressed by the equation F = ma. This means that the force acting on an object is directly proportional to its mass and the acceleration it experiences. A greater force is required to accelerate an object with a larger mass, while a smaller force is needed to accelerate an object with a smaller mass.
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